Restricting access to the event logs.

Restricting Access to the Event Logs - The Windows NT event log contains
records documenting application, security and system events taking place on the
machine. These logs can contain sensitive data, and by default, the Guest
account has access to view them. This tweak allows you to restrict access to
administrators and system accounts. Option affects the whole PC. Reboot your PC
to activate or deactivate this option. Applicable to Windows NT/2000/XP.